The new Roadmap "Starter" report is very cool way to visually build roadmaps against multiple products. However I would not call this a report, this is a missing functionality to the releases section.
This feature needs the ability to visually drag edges of releases and connect them to other depending releases, potentially even between the features as well.
Once two releases are connected by a string show a popup allowing selection of the type of a dependency (as you do today when you link records). If a releaseis blocking another, naturally when you move one the other one should move too.
Wrike does this today which is very useful method to manage features and releases across products. See attached...
This capability is currently available on the Release roadmap (accessible from the Reports page).
The Starter roadmap is meant to be a starting point in Aha! to allow you easily create a simple roadmap, while also serving as a stepping stone towards the wealth of additional roadmap visualization tools in Aha!
At this time, we would suggest using the Releases roadmap for this dependency capability. However, we do not have plans in the near-term to apply it to the Starter roadmap based on the thoughts noted above.